Order
Copolymer of Polyamide (AK 93/7)
Copolymer AK 93/7 is applied in machine building, electrical engineering, instrument making industries and in other spheres. It is often used as a substitute of non-ferrous metals.
Copolymer of Polyamide is resistant to hydrocarbon connections, organic solvents, oils, alkali solutions. AK 80/20 is dissolved in concentrated mineral acids, formic and acetic acids, phenols. Temperature range of operation is from-50 to +70 °C.
Properties of Polyamide AK 93/7 (GOST 19459-87)
| Indicator | Value |
|---|---|
| Density, g/cm³ | 1.14 |
| Melting temperature, °C, not lower | 238 |
| Mass fraction of water, %, not more | 0.4 |
| Tensile strength, MPa (kgf/cm²) | 58.8 - 68.6 (600 - 700) |
| Critical stress at cut, MPa (kgf/cm²) | 49.5 - 58.8 (550 - 600) |
| Critical stress at compression, MPa (kgf/cm²) | 98.0 - 117.6 (1000-1200) |
| Brinell hardness, MPa (kgf/cm²) | 98.0 - 117.6 (1000-1200) |
| Breaking alongation, % | 80 - 100 |
| Coefficient of friction against steel | 0.24 - 0.25 |
| Water absorption for 24 h, % | 2.1 - 2.2 |
| Water absorption, max., % | 9.0 |
| Shrinkage, % | 1.4 - 1.8 |
| Impact strength of a sample without cut at 0 °C, kJ/m² (kgf·cm/cm²) | 102.9 - 107.8 (105 - 110) |
| Impact strength of a sample without cut at -20 °C, kJ/m² (kgf·cm/cm²) | 98.0 - 107.8 (100 - 110) |
| Impact strength of a sample without cut at -50 °C, kJ/m² (kgf·cm/cm²) | 83.3 - 98.0 (85 - 100) |
| Charpy impact strength, kJ/m² (kgf·cm/cm²), not less | 3.9 (4.0) |
| Bending stress at specified value, MPa (kgf/cm²), not less | 71.5 (730) |
| Volume resistivity, Ohm·cm, not less | 1·10¹² |
| Dielectric strength, kV/mm, not less | 20 |
| Dielectric loss tangent at frequency 10⁶ Hz, not more | 0.12 |
| Combustion resistance | PV-2 |